here is bret baier on the key races we are all watching. >> republicans are defending 24 senate seats this year, a big number. democrats defending ten. we focused on this map on the 13 states that are the hottest contests that could see a change. new hampshire, pennsylvania, north carolina, florida, ohio, indiana, illinois, wisconsin, iowa, missouri, colorado, arizona and north nevada. if the election were held today based on average of polls today in each of these 13 states, here's what the map would look like. democrats would pick up four seats, and the senate as you see here would be tied, 50-50. the control of the u.s. senate would then be decided by which party won the presidency. if hillary clinton won, democrats would take the majority because then vice president kaine would break the tie. if donald trump won, then vice president pence would keep the majority in republican hands. martha: that says it all, right? coverage for you on two battleground states. mike tobin covering the ohio senate race for us and phil keating has the latest on the senate race in florida. we begin wit